REPRODUCTIVE PERFORMANCE OF CROSSBRED SUDANESE DAIRY COWS - Omer Ahmed, Faisal;Mohmmed Hassam, Nahla
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The present study was designed to investigate the effects of PGF2 or GnRH injections during postpartum on uterine involution, length of postpartum period, number of services per conception, days open and calving interval in cross-bred Sudanese dairy cows. The findings of this experiment explained that the injection of GnRH significantly shortens the time needed for uterine involution, postpartum period, days open and calving interval as compared with control (P …mehr

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Produktbeschreibung
The present study was designed to investigate the effects of PGF2 or GnRH injections during postpartum on uterine involution, length of postpartum period, number of services per conception, days open and calving interval in cross-bred Sudanese dairy cows. The findings of this experiment explained that the injection of GnRH significantly shortens the time needed for uterine involution, postpartum period, days open and calving interval as compared with control (P < 0.005, p < 0.05, P < 0.001 and P < 0.001 respectively). Moreover, the number of services per conception was improved significantly (P < 0.04). It is concluded that the use of PGF2 or GnRH during the first, second or third week postpartum improves the reproductive efficiency of cross-bred dairy cows. Thus a calf per cow per year can be produced if this regime is employed. However, a single injection of PGF2 as early as 7 days has no effects on the above parameters.
Autorenporträt
Faisal Omer AhmedAssociate professor of theriogenology, Department of Reproduction and Obstetric, Faculty of Veterinary Medicine, University of Khartoum, Sudan.